Science

4 item data set borrowed from <code><a href="/link/ltm?package=mirt&version=0.1-19&to=ltm" rd-options="ltm" data-mini-rdoc="ltm::ltm">ltm</a></code> package, first example of the <code><a href="/link/grm?package=mirt&version=0.1-19&to=ltm" rd-options="ltm" data-mini-rdoc="ltm::grm">grm</a></code> function. See more complete documentation therein.

data

Analysis of dichotomous and polychotomous response data using latent 
		trait models under the Item Response Theory paradigm. 
		Includes the multivariate two- and three-parameter logistic 
		models, confirmatory bifactor analysis, polytomous confirmatory
		and exploratory item response models, and partially-compensatory item response
		modeling in conjunction with other IRT models. 

Science: Description of Science data

Description

Usage

Arguments